One vertex per element, one color per generator, with an edge from x to x·s.
(5,6,11,15,10,7,9,13)(8,12,18,20,17,14,16,19)(21,22)(23,31)(24,29)(25,34)(26,35)(27,30)(28,32)(33,36)(1,2)(3,4)(6,7)(9,11)(12,14)(16,18)(21,23,27,25)(22,28,30,36)(24,32,26,33)(29,34,35,31)(2,4)(5,7,10,6)(8,14,17,12)(9,13,11,15)(16,19,18,20)(21,24,27,26)(22,29,30,35)(23,32,25,33)(28,34,36,31)(5,8,10,17)(6,12,7,14)(9,18,11,16)(13,20,15,19)(21,25,27,23)(22,28,30,36)(24,33,26,32)(29,34,35,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.